P0134Medium Priority
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
Category: Powertrain• Fuel and Air Metering
4 articles · 2 makes affected
What is P0134?
Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1). The upstream O2 sensor shows no voltage fluctuation, indicating a failed or disconnected sensor.
Symptoms You May Notice
- ●Check engine light
- ●Poor fuel economy
- ●Rough idle
- ●Engine hesitation
- ●Failed emissions test
How to Fix It
- ●Replace upstream O2 sensor ($100-$300, intermediate)
- ●Check sensor wiring and connectors ($50-$200, beginner)
- ●Repair exhaust leak near sensor ($150-$500, intermediate)
Owner Statistics
Based on 7,323 real owner discussions • 513 confirmed solutions
$1,894
Average Repair Cost
7%
Success Rate
31%
DIY Repairs
7,323
Data Sources
About This Data
Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.
Frequently Appears With
These codes often appear together in owner reports. Check these if you see P0134.
Based on analysis of 5 owner reports where multiple codes appeared together.